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Issue 34, 2019
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Copper-based metal–organic framework nanoparticles for sensitive fluorescence detection of ferric ions

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Abstract

A luminescent amino-functionalized metal–organic framework (Cu–MOFs) was synthesized from 2-aminoterephthalic acid and Cu(II) ions by a solvothermal method. Cu–MOFs displayed blue fluorescence with a peak at 430 nm under 330 nm excitation. Its structure was characterized by FTIR, TEM, XRD, and XPS. The fluorescence of the Cu–MOFs was quenched by Fe3+ in aqueous solutions. The limit of detection was 0.5 μM, and the linear working range extended from 2 μM to 35 μM. Additionally, a good logarithmic relationship between relative fluorescence intensity (F/F0) and Fe3+ concentrations ranging from 2 to 180 μM was obtained with a detection limit of 1.56 μM (R2 = 0.9975). No clear interference was observed when challenged with a wide variety of cations and anions. The recoveries from spiked real water samples were in the range of 91.7–107.7%, and the detection results were consistent with inductively coupled plasma mass spectrometry (ICP-MS) results. Therefore, the fluorescent sensor has great potential in environmental monitoring.

Graphical abstract: Copper-based metal–organic framework nanoparticles for sensitive fluorescence detection of ferric ions

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Article information


Submitted
24 May 2019
Accepted
02 Jul 2019
First published
15 Jul 2019

Anal. Methods, 2019,11, 4382-4389
Article type
Paper

Copper-based metal–organic framework nanoparticles for sensitive fluorescence detection of ferric ions

F. Ming, J. Hou, D. Huo, J. Zhou, M. Yang, C. Shen, S. Zhang and C. Hou, Anal. Methods, 2019, 11, 4382
DOI: 10.1039/C9AY01093A

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